Leaf peeping is an informal term in the United States for the activity in which people travel to view and photograph the fall foliage in areas where leaves change colors in autumn, particularly in New England. The origin of the term "leaf peeping" is not well known.
A similar custom in Japan is called momijigari.
The term "leaf peeper" is used both with appreciation (for those businesses that benefit from the millions that pour into New England each fall) and with disdain (from those who have to use the roads that are popular with leaf peepers). Hobbyists who get together for leaf peeping commonly refer to their gatherings as leaf peepshows.
"Leaf peeping" is considered a fall activity throughout the United States and Canada.
The term "leaf peeping" has been used in numerous TV shows, including "And It's Surely To Their Credit," an episode of The West Wing which originally aired on November 1, 2000 and "Live Free or Die," an episode of "The Sopranos" which originally aired on April 16, 2006. In "Lethal Weapons", an episode of Family Guy, obnoxious New York tourists visiting Rhode Island to see fall leaves are pejoratively referred to as "leafers".
Momijigari (紅葉狩?), from the Japanese momiji (紅葉?), "red leaves" or "maple tree" and kari (狩り?), "hunting", is the Japanese tradition of going to visit scenic areas where leaves have turned red in the autumn. It is also called kōyō (紅葉?).Kōyō is another pronunciation of the characters for "momiji" which means "fall colors" or "leaves changing colors". It is also called kanpūkai (観楓会?) in Hokkaidō. which means "getting together to view the leaves".